ffs plants leaves falling off and dieing Asap Plz

like a week or 2 left i just noticed there droping off like crazy
Can the buds still grow with out fan leaves near all the way up ?

And when do i no its ready?

help please

it might stunt their maturity but for now you might want to isolate that plant from others and let it go on its course at worse you might have to harvest a week early.